28389376 has 52 divisors (see below), whose sum is σ = 58975200. Its totient is φ = 13647872.

The previous prime is 28389373. The next prime is 28389379. The reversal of 28389376 is 67398382.

It is an interprime number because it is at equal distance from previous prime (28389373) and next prime (28389379).

It is not an unprimeable number, because it can be changed into a prime (28389373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118665 + ... + 118903.

Almost surely, 2^28389376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28389376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29487600).

28389376 is an abundant number, since it is smaller than the sum of its proper divisors (30585824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28389376 is an equidigital number, since it uses as much as digits as its factorization.

28389376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 270 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 28389376 is about 5328.1681655143. The cubic root of 28389376 is about 305.0600114827.

The spelling of 28389376 in words is "twenty-eight million, three hundred eighty-nine thousand, three hundred seventy-six".